Sandwich-structured hollow fiber membranes for osmotic power generation

Handle URI:
http://hdl.handle.net/10754/594158
Title:
Sandwich-structured hollow fiber membranes for osmotic power generation
Authors:
Fu, Feng Jiang; Zhang, Sui; Chung, Neal Tai-Shung ( 0000-0003-3704-8609 )
Abstract:
In this work, a novel sandwich-structured hollow fiber membrane has been developed via a specially designed spinneret and optimized spinning conditions. With this specially designed spinneret, the outer layer, which is the most crucial part of the sandwich-structured membrane, is maintained the same as the traditional dual-layer membrane. The inner substrate layer is separated into two layers: (1) an ultra-thin middle layer comprising a high molecular weight polyvinylpyrrolidone (PVP) additive to enhance integration with the outer polybenzimidazole (PBI) selective layer, and (2) an inner-layer to provide strong mechanical strength for the membrane. Experimental results show that a high water permeability and good mechanical strength could be achieved without the expensive post treatment process to remove PVP which was necessary for the dual-layer pressure retarded osmosis (PRO) membranes. By optimizing the composition, the membrane shows a maximum power density of 6.23W/m2 at a hydraulic pressure of 22.0bar when 1M NaCl and 10mM NaCl are used as the draw and feed solutions, respectively. To our best knowledge, this is the best phase inversion hollow fiber membrane with an outer selective PBI layer for osmotic power generation. In addition, this is the first work that shows how to fabricate sandwich-structured hollow fiber membranes for various applications. © 2015 Elsevier B.V.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Fu F-J, Zhang S, Chung T-S (2015) Sandwich-structured hollow fiber membranes for osmotic power generation. Desalination 376: 73–81. Available: http://dx.doi.org/10.1016/j.desal.2015.08.018.
Publisher:
Elsevier BV
Journal:
Desalination
Issue Date:
Nov-2015
DOI:
10.1016/j.desal.2015.08.018
Type:
Article
ISSN:
0011-9164
Sponsors:
National University of Singapore[R-279-000-381-279]; “Membrane development for osmotic power generation, Part 1. Materials development and membrane fabrication”[1102-IRIS-11-01]
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorFu, Feng Jiangen
dc.contributor.authorZhang, Suien
dc.contributor.authorChung, Neal Tai-Shungen
dc.date.accessioned2016-01-19T13:22:53Zen
dc.date.available2016-01-19T13:22:53Zen
dc.date.issued2015-11en
dc.identifier.citationFu F-J, Zhang S, Chung T-S (2015) Sandwich-structured hollow fiber membranes for osmotic power generation. Desalination 376: 73–81. Available: http://dx.doi.org/10.1016/j.desal.2015.08.018.en
dc.identifier.issn0011-9164en
dc.identifier.doi10.1016/j.desal.2015.08.018en
dc.identifier.urihttp://hdl.handle.net/10754/594158en
dc.description.abstractIn this work, a novel sandwich-structured hollow fiber membrane has been developed via a specially designed spinneret and optimized spinning conditions. With this specially designed spinneret, the outer layer, which is the most crucial part of the sandwich-structured membrane, is maintained the same as the traditional dual-layer membrane. The inner substrate layer is separated into two layers: (1) an ultra-thin middle layer comprising a high molecular weight polyvinylpyrrolidone (PVP) additive to enhance integration with the outer polybenzimidazole (PBI) selective layer, and (2) an inner-layer to provide strong mechanical strength for the membrane. Experimental results show that a high water permeability and good mechanical strength could be achieved without the expensive post treatment process to remove PVP which was necessary for the dual-layer pressure retarded osmosis (PRO) membranes. By optimizing the composition, the membrane shows a maximum power density of 6.23W/m2 at a hydraulic pressure of 22.0bar when 1M NaCl and 10mM NaCl are used as the draw and feed solutions, respectively. To our best knowledge, this is the best phase inversion hollow fiber membrane with an outer selective PBI layer for osmotic power generation. In addition, this is the first work that shows how to fabricate sandwich-structured hollow fiber membranes for various applications. © 2015 Elsevier B.V.en
dc.description.sponsorshipNational University of Singapore[R-279-000-381-279]en
dc.description.sponsorship“Membrane development for osmotic power generation, Part 1. Materials development and membrane fabrication”[1102-IRIS-11-01]en
dc.publisherElsevier BVen
dc.subjectPolybenzimidazole (PBI)en
dc.subjectPressure retarded osmosis (PRO)en
dc.subjectSandwich-structureden
dc.titleSandwich-structured hollow fiber membranes for osmotic power generationen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalDesalinationen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, National University of Singapore, Singaporeen
kaust.authorZhang, Suien
kaust.authorChung, Neal Tai-Shungen
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